Manganese coating α-Ni(OH)2 as high-performance cathode material for Ni-MH battery
The α-Ni(OH) 2 coated with manganese (Mn) materials was synthesized by the chemical precipitation method, and the electrochemical properties were investigated. The results showed that the ingredient of the coating is a mixture of MnO 2 and Mn 2 O 3 , and the coating can inhibit the intercalated anio...
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Published in | Ionics Vol. 28; no. 3; pp. 1265 - 1272 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer Berlin Heidelberg
01.03.2022
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | The α-Ni(OH)
2
coated with manganese (Mn) materials was synthesized by the chemical precipitation method, and the electrochemical properties were investigated. The results showed that the ingredient of the coating is a mixture of MnO
2
and Mn
2
O
3
, and the coating can inhibit the intercalated anions escape and stabilize the α-Ni(OH)
2
phase structure in KOH alkaline solution. The coated electrodes have higher discharge capacities and higher capacity retention rates than the uncoated α-Ni(OH)
2
electrode, the discharge capacity of Mn-coated electrodes is over 350 mAh g
−1
, and the capacity retention rate exceeds 92%, separately. The reason may be that the Mn coatings can block or decelerate water molecule and the anion to escape from the interlayers, therefore prevent α phase structural collapse and maintain high discharge capacity during a long lifespan cycle. Therefore, the Mn coating α-Ni(OH)
2
is a promising candidate for high-power Ni-MH batteries. |
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ISSN: | 0947-7047 1862-0760 |
DOI: | 10.1007/s11581-021-04366-6 |